/*-
 *   BSD LICENSE
 *
 *   Copyright (c) Intel Corporation.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "ctx.h"
#include "stats.h"

int
vbdev_ocf_stats_get(ocf_cache_t cache, char *core_name, struct vbdev_ocf_stats *stats)
{
	int status;
	ocf_core_t core;

	status = ocf_core_get_by_name(cache, core_name, strlen(core_name), &core);
	if (status) {
		return status;
	}

	return ocf_stats_collect_core(core, &stats->usage, &stats->reqs, &stats->blocks, &stats->errors);
}

#define WJSON_STAT(w, stats, group, field, units) \
	spdk_json_write_named_object_begin(w, #field); \
	spdk_json_write_named_uint64(w, "count", stats->group.field.value); \
	spdk_json_write_named_string_fmt(w, "percentage", "%lu.%lu", \
		stats->group.field.fraction / 100, stats->group.field.fraction % 100); \
	spdk_json_write_named_string(w, "units", units); \
	spdk_json_write_object_end(w);

void
vbdev_ocf_stats_write_json(struct spdk_json_write_ctx *w, struct vbdev_ocf_stats *stats)
{
	spdk_json_write_object_begin(w);

	spdk_json_write_named_object_begin(w, "usage");
	WJSON_STAT(w, stats, usage, occupancy, "4KiB blocks");
	WJSON_STAT(w, stats, usage, free, "4KiB blocks");
	WJSON_STAT(w, stats, usage, clean, "4KiB blocks");
	WJSON_STAT(w, stats, usage, dirty, "4KiB blocks");
	spdk_json_write_object_end(w);

	spdk_json_write_named_object_begin(w, "requests");
	WJSON_STAT(w, stats, reqs, rd_hits, "Requests");
	WJSON_STAT(w, stats, reqs, rd_partial_misses, "Requests");
	WJSON_STAT(w, stats, reqs, rd_full_misses, "Requests");
	WJSON_STAT(w, stats, reqs, rd_total, "Requests");
	WJSON_STAT(w, stats, reqs, wr_hits, "Requests");
	WJSON_STAT(w, stats, reqs, wr_partial_misses, "Requests");
	WJSON_STAT(w, stats, reqs, wr_full_misses, "Requests");
	WJSON_STAT(w, stats, reqs, wr_total, "Requests");
	WJSON_STAT(w, stats, reqs, rd_pt, "Requests");
	WJSON_STAT(w, stats, reqs, wr_pt, "Requests");
	WJSON_STAT(w, stats, reqs, serviced, "Requests");
	WJSON_STAT(w, stats, reqs, total, "Requests");
	spdk_json_write_object_end(w);

	spdk_json_write_named_object_begin(w, "blocks");
	WJSON_STAT(w, stats, blocks, core_volume_rd, "4KiB blocks");
	WJSON_STAT(w, stats, blocks, core_volume_wr, "4KiB blocks");
	WJSON_STAT(w, stats, blocks, core_volume_total, "4KiB blocks");
	WJSON_STAT(w, stats, blocks, cache_volume_rd, "4KiB blocks");
	WJSON_STAT(w, stats, blocks, cache_volume_wr, "4KiB blocks");
	WJSON_STAT(w, stats, blocks, cache_volume_total, "4KiB blocks");
	WJSON_STAT(w, stats, blocks, volume_rd, "4KiB blocks");
	WJSON_STAT(w, stats, blocks, volume_wr, "4KiB blocks");
	WJSON_STAT(w, stats, blocks, volume_total, "4KiB blocks");
	spdk_json_write_object_end(w);

	spdk_json_write_named_object_begin(w, "errors");
	WJSON_STAT(w, stats, errors, core_volume_rd, "Requests");
	WJSON_STAT(w, stats, errors, core_volume_wr, "Requests");
	WJSON_STAT(w, stats, errors, core_volume_total, "Requests");
	WJSON_STAT(w, stats, errors, cache_volume_rd, "Requests");
	WJSON_STAT(w, stats, errors, cache_volume_wr, "Requests");
	WJSON_STAT(w, stats, errors, cache_volume_total, "Requests");
	WJSON_STAT(w, stats, errors, total, "Requests");
	spdk_json_write_object_end(w);

	spdk_json_write_object_end(w);
}